What are lifecycle methods in React components?
Asked on Sep 25, 2024
Answer
In React, lifecycle methods are special methods that allow you to hook into specific points in a component's life, such as when it mounts, updates, or unmounts. These methods are primarily used in class components.
class MyComponent extends React.Component {
componentDidMount() {
// Invoked immediately after a component is mounted
console.log("Component mounted!");
}
componentDidUpdate(prevProps, prevState) {
// Invoked immediately after updating occurs
console.log("Component updated!");
}
componentWillUnmount() {
// Invoked immediately before a component is unmounted and destroyed
console.log("Component will unmount!");
}
render() {
return <div>Hello, World!</div>;
}
}Additional Comment:
✅ Answered with JavaScript best practices.- The "componentDidMount" method is called once when the component is inserted into the DOM.
- The "componentDidUpdate" method is called after the component's updates are flushed to the DOM.
- The "componentWillUnmount" method is called right before the component is removed from the DOM.
- These lifecycle methods are specific to class components; functional components use hooks like "useEffect" to achieve similar behavior.
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